C# iTextSharp表格：未显示的行

我在使用iTexSharp版本5.5.7.0的表时遇到问题

我想建立一个按类别和子类别分组的产品目录

我需要显示类别名称、子类别名称以及其中的产品。 当子类别更改时，我需要重复类别名称：

Category 1 
  Sub category 1
    Product 1 table 
    Product 2 table...
Category 1
  Sub category 2
    Product 1 table ...
Category 2 
  Sub category 1
    Product 1 table 
    Product 2 table...
Category 2 
  Sub category 2
    Product 1 table 
    Product 2 table
    Product 3 table...

问题是，我不希望类别和子类别名称显示在页面底部，并在下一页显示该子类别的第一个产品

因此，我创建了一个tableContainer，在其中添加tableCategory、tableSubCategory和第一个tableProduct

我将这个tabContainer添加到文档中，然后添加一个包含剩余产品的表。 我尝试使用KeepTogether、SplitRows和SplitLate，但没有成功。 有时它似乎有效，但页面上有一些行没有显示，如：

End of Page :
  Category  
    Sub category 
New Page :  
    Product 2 table...
    Product 3 table...

缺少product 1表

我的文件为A4大小，带页边距：

 pdfDocument =  pdfDocument = new Document(iTextSharp.text.PageSize.A4, 20, 20, 40, 40);
 pdfWriter = PdfWriter.GetInstance(pdfDocument, new FileStream(path, fileMode)); 

我在文档中显示数据的方式：

PdfPTable tableContainer = CreateTable(new float[] { 100f }, false, 0f, 0f,    pdfDocument.PageSize.Width);
tableContainer.SplitRows = false;
tableContainer.KeepTogether = true;

foreach (string category in categoriesList)
{
     //Cell category
    PdfPCell cellCategory = CreateCell(category, Element.ALIGN_MIDDLE, Element.ALIGN_LEFT, "Oswald", Rectangle.NO_BORDER, 8, Font.BOLD, BaseColor.WHITE, lightBlueColor, 1, 30);


foreach (string subCategory in subCategoriesList)
{   
     //Cell sub category
    PdfPCell cellSubCategory = CreateCell(category, Element.ALIGN_MIDDLE, Element.ALIGN_LEFT, "Oswald", Rectangle.NO_BORDER, 8, Font.BOLD, BaseColor.WHITE, lightBlueColor, 1, 30);

    tableContainer.AddCell(cellCategory);
    tableContainer.AddCell(cellSubCategory);

    //table with list of products
    PdfPTable productsTable = CreateTable(new float[] { 100f }, false, 0f, 10f, pdfDocument.PageSize.Width - (pdfDocument.LeftMargin + pdfDocument.RightMargin) - 40);

    foreach (Product p in productsFilteredList)
    {
        //Create product Table
        PdfPTable productTable = CreateProductTable(pdfDocument, p);

        //If first product : category , sub category and first product must be displayed together on the same page
        if(firstProduct)
            tableContainer .AddCell(productTable);              
        else
            productsTable.AddCell(productTable); 
    }

    pdfDocument.Add(tableContainer);
    pdfDocument.Add(productsTable);
}
}


private  PdfPTable CreateProductTable(Document pdfDocument, product p)
{
PdfPTable productTable = CreateTable(new float[] { 25f, 20f, 35f, 10f, 10f }, false, 0f, 0f, pdfDocument.PageSize.Width - (pdfDocument.LeftMargin + pdfDocument.RightMargin) - 40);

PdfPCell cellImage = CreateCellImage(tempFolderPhotosPath + p.Code + ".jpeg", 50f, Element.ALIGN_MIDDLE, Element.ALIGN_CENTER, 1, Rectangle.UNDEFINED, 60f);
cellImage.PaddingLeft = 30f;
productTable.AddCell(cellImage);

productTable.AddCell(CreateCell(p.Code, Element.ALIGN_MIDDLE, Element.ALIGN_CENTER, "Oswald", Rectangle.NO_BORDER, 7, Font.BOLD, BaseColor.BLACK, backGroundColor, 1, productTable.DefaultCell.Height));
productTable.AddCell(CreateCell(p.Description, Element.ALIGN_MIDDLE, Element.ALIGN_LEFT, "Oswald", Rectangle.NO_BORDER, 8, Font.NORMAL, BaseColor.BLACK, backGroundColor, 1, productTable.DefaultCell.Height));
productTable.AddCell(CreateCell(p.Reference, Element.ALIGN_MIDDLE, Element.ALIGN_CENTER, "Oswald", Rectangle.NO_BORDER, 8, Font.BOLD, BaseColor.BLACK, backGroundColor, 1, productTable.DefaultCell.Height));
productTable.AddCell(CreateCell(p.Price , Element.ALIGN_MIDDLE, Element.ALIGN_CENTER, "Oswald", Rectangle.NO_BORDER, 8, Font.NORMAL, BaseColor.BLACK, backGroundColor, 1, productTable.DefaultCell.Height));
return productTable;
}

private  PdfPCell CreateCell(string content, int verticalAlignement, int horizontalAlignement, string fontName, int border, int fontSize, int fontStyle, BaseColor fontColor, BaseColor backgroundColor, int rowSpan, float minHeight)
{
PdfPCell cell = new PdfPCell(new Phrase(new Chunk(content, FontFactory.GetFont(fontName, fontSize, fontStyle, fontColor))));
cell.BackgroundColor = backgroundColor;
cell.HorizontalAlignment = horizontalAlignement;
cell.VerticalAlignment = verticalAlignement;
cell.Border = border;
cell.Rowspan = rowSpan;
cell.MinimumHeight = minHeight;
cell.Border = border;

return cell;
}

private  PdfPCell CreateCellImage(string pathImage, float widthPercentage, int verticalAlignement, int horizontalAlignement, int rowSpan, int border, float minHeight)
{
PdfPCell cell = new PdfPCell();
cell.HorizontalAlignment = horizontalAlignement;
cell.VerticalAlignment = verticalAlignement;
cell.Border = border;
cell.Rowspan = rowSpan;
cell.Border = Rectangle.NO_BORDER;

Image image = Image.GetInstance(pathImage);
image.ScaleToFit(widthPercentage, minHeight);

cell.MinimumHeight = minHeight + 10;
cell.AddElement(image);

return cell;
}

我需要一种方法来链接表，并强制它们显示在同一页上。如果它不适合当前页面的sapce剩余部分，则自动创建一个新页面

有人知道如何做到这一点吗？ 谢谢